Q1: Design the pavement for an expressway consisting of an asphalt concrete surface, a crushed stone base, and a granular subbase using the 1993 AASHTO design method. The cumulative ESAL in the design lane for a design period of 15 years is 7x106. The area has good quality drainage with 10% of the time the moisture level is approaching saturation. The effective roadbed soil resilient modulus is 7 ksi, the subbase has a CBR value of 80, the resilient modulus of the base is 40×103 psi, and the resilient modulus of asphalt concrete is 4.5×105 psi. Assume a reliability level of 95%, So of 0.45, po = 4.6, and pt = 3.0.

Q1: Design the pavement for an expressway consisting of an asphalt concrete surface, a crushed stone base, and a granular subbase using the 1993 AASHTO design method. The cumulative ESAL in the design lane for a design period of 15 years is 7x106. The area has good quality drainage with 10% of the time the moisture level is approaching saturation. The effective roadbed soil resilient modulus is 7 ksi, the subbase has a CBR value of 80, the resilient modulus of the base is 40×103 psi, and the resilient modulus of asphalt concrete is 4.5×105 psi. Assume a reliability level of 95%, So of 0.45, po = 4.6, and pt = 3.0.

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter19: Design Of Flexible Highway Pavements

Section: Chapter Questions

Problem 11P

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Similar questions

A flexible pavement is designed with 5 inches of hot-mix asphalt (HMA) wearing surface, 6 inches of hot-mix asphaltic base, and 10 inches of crushed stone subbase. All drainage coefficients are 1.0. Daily traffic is 200 passes of a 20-kip single axle, 200 passes of a 40-kip tandem axle, and 80 passes of a 22-kip single axle.If the initial minus the terminal PSI is 2.0 (the TSI is 2.5), the soil resilient modulus is 3000 lb/in2, and the overall standard deviation is 0.6, what is the probability(reliability) that this pavement will last 20 years before reaching its terminal serviceability?
A northbound direction on an interstate highway consists of four lanes of flexible pavement. It is conservatively designed with a 10-inch sand-mix asphaltic surface, 10-crushed stone base, and a 10-inch crushed-stone subbase (all drainage coefficients are 1.0). The subgrade CBR is 3, the overall standard deviation is 0.4, and the reliability is 95%. The initial PSI is 4.6 and the final PSI is 2.5. Daily total northbound road traffic consists of 51,000 cars (each with two 2-kip single axles), 840 buses (each with two 20-kip single axles), and 1,000 heavy vehicles (each with one 12-kip single axle and two 34-kip tandem axles). How many years was this pavement designed to last?
A flexible pavement was designed to have a 6-inch sand-mix asphaltic surface, 8-inch soil-cement baseand a 21-inch crushed-stone subbase (all drainagecoefficients are 1.0). The pavement was designed for800 12-kip single axles and 1600 34-kip tandem axlesper day in the design direction. The reliability used was90%, the overall standard deviation was 0.35, initial PSIwas 4.7, the TSI was 2.5 and the soil resilient moduluswas 2582 lb/in2. If the road has three lanes in the designdirection (and was conservatively designed), for howmany years was the pavement designed to last?
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For the following temperature conditions, calculate the proper PG grade for both 50% and 98% reliabilities (show your calculation).Seven-day maximum pavement temperature of 48°C with a standarddeviation of 2.5°C. Minimum pavement temperature of -21°C with a standard deviation of 3°C.
Pls answer w/ complete solution. Asap (Transportation Engineering) Determine the thickness base and subgrade of flexible pavement if the wheel load is 90 kN and has wheel contact area of 88075 sq. mm.. Strength capacity of base is 0.35 MPa and 0.15 MPa for Subgrade.
i need an answer immediately thank you Design the thickness of a pavement to carry a wheel load of 52kN based on the following conditions and type of pavement. 3. A flexible pavement with an allowable subgrade pressure of 0.14MPa and the max. tire pressure equal to 0.52MPa. This pressure is assumed to be uniformly distributed over the area of tire contact on the roadway according to the principle of cone pressure distribution.
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